CHAPTER 1INTRODUCTION1.1 The Tropical Rainforest and Its Challenges The tropical rainforest is located near the equator, the average rainfall is over 110 inches per day year and consistently at warm temperatures from around 25°C to 27C° and vary little from month to month (Molles, 2005). This warm temperature creates suitable conditions for plant growth and the life of a variety of animal species. The conditions of the rainforest meant that it could host a greater diversity of organisms than any other terrestrial biome. Although it covers only more than 2% of the Earth's surface, at least half of the plant and animal species have been recorded worldwide in tropical rainforest (Corlett and Primack, 2008). Besides that, the rainforest also contributes to the human economy by providing material raw materials, timber, food, and so on. A single rainforest can be home to several thousand insect species. Most rainforest plant species depend on animals, from bats, birds, butterflies and bees to pollinate flowers. According to Molles (2005), rainforest soils are often nutrient-poor, acidic, and low in organic matter. However, rainforest plants are adapted for conservation (Corlett and Primack, 2008). The rainforest has been cut down over the last century, approximately 2,000 trees are cut down in rainforests around the world every minute (Corlett and Primack, 2008). . Increasing industrialization and human population density are so concerning that they will place further pressure on both the physical environment and the biodiversity of the remaining rainforest. Malaysia. Furthermore, there are also few species of uncertain status.1.5 Importance of this studyOdonata is one of the bioindicators of the environment that show us which of the habitats containing the good environment. By studying temporal changes in the Odonata community, we obtain information on the health of the ecosystem. Furthermore, this study also provides information on the relationship with the Odonate community and the factors that influence it. Thus, helping in monitoring and management of the environment and conservation of the Odonati community.1.6 Objective of this studyThe main purpose of this studyI. Compare the diversity of the Odonata community between the previous study (2005/2006) and the present study (2012/2013).II. To study the relationship between temporal changes in the Odonata community between 6 years and environmental factors.